Fix conditional checks for VBFNLO detection

mirror download address for MG5 and NJet

ready for 2.3.0

Added tag release-2-3-0 for changeset a8811b3ef815

Removed tag release-2-3-0

ready for 7.3.0

Added tag herwig-7-3-0 for changeset d7f1293681a1

Removed tag herwig-7-3-0

suppress c++17/c++20 related warnings

merge from release

initialise all variables in CzyzNucleonFormFactor constructor

fix AlphaIn values

untrak gosam2herwig and herwig-mergegrids

set default tune with KineticThresholdShift

Added tag release-2-3-0 for changeset 8b712e846af5

merge release 2-3-0

ready for 2.3.0

untrak gosam2herwig and herwig-mergegrids

merge release 7.3.0

Added tag herwig-7-3-0 for changeset 9c12a19ed7fd

ready for 7.3.0

fix diskcheck error for gosam2herwig

ready for 7.3.0 release

patch to fix segfault in min bias with read+run

disable KineticThresholdShift for release

merge from release

fix ClusterFissioner::persistentOutput

do not add c++14 flag twice

debug in Tests/python/HerwigInputs

debug generic flag in ufo2herwig

remove obsolete text

return merge-SppS script

bump madgraph, rivet and yoda versions

update W- mass

maintain grid compatibility in Matchbox